Quantization of wavelet coefficients

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Pat
Pat 2012-12-19
I have performed the code
input_image1=imread('rice.png');
n=2
[Lo_D,Hi_D,Lo_R,Hi_R] = wfilters('haar');
[c,s]=wavedec2(input_image,n,Lo_D,Hi_D);
now i want to perform quantization on c and s ,quantization must be performed on both c and s ,not separately
please help

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回答（1 个）

Wayne King
Wayne King 2012-12-19
Please be specific on what you mean by quantization here? If you mean something like an integer-to-integer wavelet transform, then the toolbox provides that with lifting. Or are you saying you want to represent the double coefficient output of wavedec2 as a certain data type?
If it is the latter, you have a number of options depending on what MathWorks products you have installed.
  1 个评论
Pat
Pat 2012-12-20
in the image
http://imgur.com/Noo0A
please can you tell which quantization method can be applied,because i have to recover at the decoding side

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